Form for window and door lintels and the like



Aug. 23, 1960 M. s. PLEITGEN ETAL 2,949,656

FORM FOR WINDOW AND DOOR LINTELS AND THE LIKE Filed Feb. 6, 1956 3 Sheets-Sheet l IN V EN TORS Flc 1'13 e 1960 M. G. PLEITGEN ET AL 2,949,656

FORM FOR WINDO Filed Feb. 6, 1956 W AND DOOR LINTELS AND THE LIKE 3 Sheets-Sheet 2 l INVENTOR-S Max P c 19 1960 M. G. PLEITGEN ET AL 2,949,656

FORM FOR WINDOW AND DOOR LINTELS AND THE LIKE Filed Feb. 6, 1956 3 Sheets-Sheet 3 rHn I'll- 2,949,656 Patented Aug. 23, 1960 FORW FOR WINDOW AND DOOR LINTELS AND THE LIKE Max G. Pleitgen and Ernst M. Klaus, both of Worringerstr. 70, Dusseldorf, Germany Filed Feb. 6, 1956, Ser. No. 563,791 2 Claims. (Cl. 25-118) The present invention relates to a form, especially for door and window lintels, which comprises two troughlike metal members adapted longitudinally to be displaced relative to each other and also adapted to be fixedly maintained with regard to each other in their respective adjusted position.

Forms of the above mentioned general type are known. Thus, for instance, it has been suggested to make such forms of two or more Z-shaped metal plates provided with horizontal legs partly overlapping each other. The metal plates are adapted to be displaced relative to each other in conformity with the desired lintel and to be clamped fast to each other in the desired respective position. Forms of this type have the drawback that they require lateral encasing of the lintel by means of wooden boards.

Also box or trough-like adjustable steel forms are known which are open toward the bottom or toward the top. This type of form, however, is suitable for a single purpose only namely for the preparation of steel concrete ribbed ceilings.

It is, therefore, an object of the present invention to provide a form for window and door lintels, which will overcome the above mentioned drawbacks.

It is another object of this invention to provide an improved form for window and door lintels, which will save wood and labor to a considerable extent.

It is still another object of this invention to provide a form of the type set forth in the preceding paragraph which may be designed as a two-component form for respectively allowing a variation of the form as to its length or as a four-component form for allowing an adjustment of the form in longitudinal direction as well as transverse thereto.

These and other objects and advantages of the invention will appear more clearly from the following specification in connection with the accompanying drawings, in which Fig. 1 represents a perspective view of a four-component lintel form according to the invention.

Figure 2 is a side view of the lintel form shown in Figure 1, this view showing the form in place of a brick wall.

Fig. 3 is a bottom view of Fig. 1.

Fig. 4 is a cross section of Fig. 1 taken along the line IV-IV thereof with the connecting bolts and nuts omitted.

Fig. 5 is a side view of the lintel 1 installed in a wall.

Fig. 6 is a cross section of a modified lintel form according to the invention which is variable in longitudinal direction only.

The primary feature of the form according to the present invention, which is composed of a plurality of trough-like metal members adjustable relative to each other in longitudinal direction, consists in that the metal members are rigidly connected to stiffening members arranged on the outside of the vertical legs of the troughlike metal members. These stifiening members may be form according to Fig.

. provided with designed as sheet metal girders, profiled girders, or lattice girders and are displaceable relative to each other in longitudinal direction. The said stiffening members may be held in their respective adjusted position by means of hammerhead bolts extending through oblong openings in said stiffening members, said stiffening members protruding beyond the outer ends of the form elements so as to rest against the masonry. According to one embodiment of the invention, the trough-like form components are made of pairs of angular parts displaceable relative to each other in a direction transverse to the axis of the lintel. Furthermore, this embodiment comprises two parts displaceable relative to each other along the longitudinal axis of the lintel. Each of said parts is provided below thereof with a stiffening or reinforcing member which may be designed as sheet metal girder, profiled girder, or lattice girder, and does not protrude beyond the ends of the form components. These last mentoned parts can likewise selectively be held in their respective adjusted positions.

When the form has been properly installed, the lattice girders, profiled girders, or sheet metal girders arranged on the trough at the right and left-hand side of the axis of the lintel protrude beyond the bearing for the lintel and beyond the side walls of the masonry so that said girders will rest against the masonry at both sides. Additionally the lateral stilfening members may be tied to each other by wire. To this end, according to one embodiment of the invention, the form members have their upper edge buttons around which the tie wires are looped, and the edges of the form components therebelow are so designed that the buttons will pass below the upper form component.

For purposes of journalling the trough-like form, according to one embodiment of the invention, the form components have their outer ends which are within the range of the Width of the masonry, provided with displaceable latches which are arranged below the lintel girder and can be pushed outwardly. When removing the form, the said latches may due to their bent ends be pushed back in horizontal and lintel axial direction toward the central portion of the opening in the masonry.

Referring now to the drawings in detail and Figs. 1 to 5 thereof in particular, Fig; bodiment of the lintel form according to the invention. As will be seen from the drawing, the angled, profiled metal members 2 and 7 form with each other a trough and have their upwardly directed legs provided with sheet metal girders, lattice girders, or profiled girders 12. These girders 12 which are located on the outside of the members 2 and 7 are due to their design completely stiff and make the members 2 and 7 self-supporting. The metal members 2 and 7 are at that end of the trough which is adjacent the masonry, fixedly connected with each other by a countersunk screw 8 so that the width of the trough fully corresponds to the required width of the lintel. The upper surfaces of the stiffening or reinforcing members 12 are in appropriate manner provided with buttons 9 which may be tied to each other by wire 16 so that an outward pushing or lateral displacement of the edges of the lintel box by the concrete during the filling operation will be impossible.

The sheet metal members 1 and 6 correspond as to shape to the sheet metal members 2 and 7. The members 1 and 6 are so designed that they can be slipped into the trough formed by the members 2 and 7 until metal pants rests on metal parts. The sheet metal members are also connected with each other by a screw 8 at the other end of the trough which is located opposite to the connection by the first mentioned screw 8. Thus, there are always two troughs which precisely fit into each other and which 1 shows a four-component em after adjustment of the desired width of the lintel by means of the screws 8 can together with the stiffening members 12 be moved relative to each other to thereby adapt the lintel form or lintel girder precisely to the length of the desired lintel.

After the sheet metal pairs 2, 7 and 1, 6 have been ad-- justed relative to each other in conformity with the desired length, said sheet metal pairs may be fixedly and rigidly connected With each other. This is made possible by the fact that the sheet metal members on the outer side of the reinforcements 12 areprovided with oblong apertures 5 through which extend hammerhead bolts 4 serving as connecting means. In addition thereto, each of the sheet metal members 1 and 2 is provided with a reinforcement 13 having oblong apertures. Also through these aperturm hammerhead bolts 14 extend for connecting the reinforcements 13 with each other. The reinforcements 13 are displaceable relative to each other in longitudinal direction and may be fixedly connectedto each other. These reinforcements 13 which are arranged below the form components may be designed as sheet metal girders, profiled girders, or lattice girders. Their ends do not protrude beyond the form components.

Also the trough-like sheet metal pair 1, 6 is similar to the sheet metal members 2 and 7 provided with buttons 9 which, however, are arranged in a depression 9a of the sheet metal members 1 and 6 so that they will not interfere with the sliding in of the sheet metal members 1, 6 into the sheet metal members 2, 7.

Below the sheet metal member 1 there are provided latches 3 which can be displaced. The latches 3 (Fig. 3 are movable in sleeves 3' which are preferably welded to the angles of the sheet metal members 1 and 13 respectively. The said latches 3 serve for resting the entire form upon the masonry surrounding the opening bridged by the form (Fig. 5).

With reference to Fig. 6, showing a two-component form according to the invention, the width of the trough cannot be varied inasmuch as only two already trough-like formed sheet metal members 10 and 11 engage each other,

The design of the stiffening members 12, the buttons 9 and the adjustment of the length of the trough by the hammerhead bolts 4 fully correspond to the four-component form of Fig. 1.

When the form according to the invention has been installed, the sheet metal members within the opening in the masonry to be bridged abut the respective side of the masonry wall, i.e. the said sheet metal members are confined or are limited by the spacing between the masonry walls.

As will be obvious from the above, the present invention makes it possible to provide a two or four-component lintel form. The two-component form allows an adjustment in longitudinal direction, while the four-component form additionally allows an adjustment as to width in conformity with the respective conditions.

It is, of course, understood that the present invention is, by no means, limited to the particular constructions shown in the drawings but also comprises any modifications within the scope of the appended claims.

What we claim is:

l. A form for pouring concrete, especially for pouring door and window lintels, which includes: a plurality of trough-shaped sheet metal form components telescopically slidable on each other in longitudinal direction of said form components, each of said form components includ ing longitudinally and substantially vertically extending side walls, a plurality of stittening means respectively rigidly connected to said side walls and located outwardly thereof, said stiffening means extending over a considerable portion of the height of the respective adjacent side walls and forming therewith U-shaped girders with the legs of said U-shaped girders extending downwardly, spacer means interposed between the legs of each of said girders near the lower end of said legs, the girder of one of said form components telescopically engaging the adjacent girder of the other form component, and knob means mounted on the top surface of said girder for receiving tie wires for tying oppositely located girders of the same form component to each other.

2. A form according to claim 1, in which the top surface of the girders of one of said form components has a depression supporting the respective knob means.

References Cited in the file of this patent UNITED STATES PATENTS 1,462,934 Fluor July 24, 1923 1,863,549 Lockwood June 14, 1932 1,881,971 Roedig Oct. 11, 1932 2,306,722 Fox Dec. 29, 1942 2,704,876 Puckett et a1. Mar. 29, 1955 2,761,475 La Hayne Sept. 4, 1956 FOREIGN PATENTS 1,010,529 France Mar. 26, 1952 1,015,502 France Aug. 6, 1952 

